Add top level push raises Defect to p2p code (#374)

eth/p2p.nim

@@ -5,6 +5,8 @@
 #   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
 # at your option. This file may not be copied, modified, or distributed except according to those terms.
 
+{.push raises: [Defect].}
+
 import
   std/[tables, algorithm, random],
   bearssl, chronos, chronos/timer, chronicles,
@@ -14,8 +16,7 @@ import
 export
   p2p_types, rlpx, enode, kademlia
 
-proc addCapability*(node: var EthereumNode, p: ProtocolInfo)
-    {.raises: [Defect].} =
+proc addCapability*(node: var EthereumNode, p: ProtocolInfo) =
   doAssert node.connectionState == ConnectionState.None
 
   let pos = lowerBound(node.protocols, p, rlpx.cmp)
@@ -36,7 +37,7 @@ proc newEthereumNode*(keys: KeyPair,
                       addAllCapabilities = true,
                       useCompression: bool = false,
                       minPeers = 10,
-                      rng = newRng()): EthereumNode {.raises: [Defect].} =
+                      rng = newRng()): EthereumNode =
 
   if rng == nil: # newRng could fail
     raise (ref Defect)(msg: "Cannot initialize RNG")
@@ -79,7 +80,7 @@ proc processIncoming(server: StreamServer,
 proc listeningAddress*(node: EthereumNode): ENode =
   node.toENode()
 
-proc startListening*(node: EthereumNode) =
+proc startListening*(node: EthereumNode) {.raises: [CatchableError, Defect].} =
   # TODO allow binding to specific IP / IPv6 / etc
   let ta = initTAddress(IPv4_any(), node.address.tcpPort)
   if node.listeningServer == nil:
@@ -115,7 +116,7 @@ proc connectToNetwork*(node: EthereumNode,
     trace "Waiting for more peers", peers = node.peerPool.connectedNodes.len
     await sleepAsync(500.milliseconds)
 
-proc stopListening*(node: EthereumNode) =
+proc stopListening*(node: EthereumNode) {.raises: [CatchableError, Defect].} =
   node.listeningServer.stop()
 
 iterator peers*(node: EthereumNode): Peer =

eth/p2p/p2p_protocol_dsl.nim

@@ -1,3 +1,5 @@
+{.push raises: [Defect].}
+
 import
   std/[options, sequtils],
   stew/shims/macros, chronos, faststreams/outputs
@@ -1004,7 +1006,11 @@ macro emitForSingleBackend(
     peerState.getType, networkState.getType)
 
   result = p.genCode()
+  try:
     result.storeMacroResult true
+  except IOError:
+    # IO error so the generated nim code might not be stored, don't sweat it.
+    discard
 
 macro emitForAllBackends(backendSyms: typed, options: untyped, body: untyped): untyped =
   let name = $(options[0])

eth/p2p/peer_pool.nim

@@ -8,6 +8,8 @@
 # PeerPool attempts to keep connections to at least min_peers
 # on the given network.
 
+{.push raises: [Defect].}
+
 import
   std/[os, tables, times, random, sequtils, options],
   chronos, chronicles,
@@ -100,7 +102,7 @@ proc connect(p: PeerPool, remote: Node): Future[Peer] {.async.} =
   #   self.logger.exception("Unexpected error during auth/p2p handshake with %s", remote)
   # return None
 
-proc lookupRandomNode(p: PeerPool) {.async, raises: [Defect].} =
+proc lookupRandomNode(p: PeerPool) {.async.} =
   discard await p.discovery.lookupRandom()
   p.lastLookupTime = epochTime()
 
@@ -108,7 +110,7 @@ proc getRandomBootnode(p: PeerPool): Option[Node] =
   if p.discovery.bootstrapNodes.len != 0:
     result = option(p.discovery.bootstrapNodes.sample())
 
-proc addPeer*(pool: PeerPool, peer: Peer) {.gcsafe, raises: [Defect].} =
+proc addPeer*(pool: PeerPool, peer: Peer) {.gcsafe.} =
   doAssert(peer.remote notin pool.connectedNodes)
   pool.connectedNodes[peer.remote] = peer
   connected_peers.inc()
@@ -163,7 +165,7 @@ proc maybeConnectToMorePeers(p: PeerPool) {.async.} =
   if p.connectedNodes.len == 0 and (let n = p.getRandomBootnode(); n.isSome):
     await p.connectToNode(n.get())
 
-proc run(p: PeerPool) {.async, raises: [Defect].} =
+proc run(p: PeerPool) {.async.} =
   trace "Running PeerPool..."
   p.running = true
   while p.running:

eth/p2p/rlpx.nim

@@ -70,8 +70,7 @@ chronicles.formatIt(Peer): $(it.remote)
 
 include p2p_backends_helpers
 
-proc requestResolver[MsgType](msg: pointer, future: FutureBase)
-    {.gcsafe, raises:[Defect].} =
+proc requestResolver[MsgType](msg: pointer, future: FutureBase) {.gcsafe.} =
   var f = Future[Option[MsgType]](future)
   if not f.finished:
     if msg != nil:
@@ -117,7 +116,7 @@ proc messagePrinter[MsgType](msg: pointer): string {.gcsafe.} =
   # result = $(cast[ptr MsgType](msg)[])
 
 proc disconnect*(peer: Peer, reason: DisconnectionReason,
-                 notifyOtherPeer = false) {.gcsafe, raises: [Defect], async.}
+  notifyOtherPeer = false) {.gcsafe, async.}
 
 template raisePeerDisconnected(msg: string, r: DisconnectionReason) =
   var e = newException(PeerDisconnected, msg)
@@ -374,7 +373,7 @@ proc registerRequest(peer: Peer,
 
   doAssert(not peer.dispatcher.isNil)
   let requestResolver = peer.dispatcher.messages[responseMsgId].requestResolver
-  proc timeoutExpired(udata: pointer) {.gcsafe, raises:[Defect].} =
+  proc timeoutExpired(udata: pointer) {.gcsafe.} =
     requestResolver(nil, responseFuture)
 
   discard setTimer(timeoutAt, timeoutExpired, nil)
@@ -880,7 +879,7 @@ p2pProtocol DevP2P(version = 5, rlpxName = "p2p"):
   proc pong(peer: Peer, emptyList: EmptyList) =
     discard
 
-proc removePeer(network: EthereumNode, peer: Peer) {.raises: [Defect].} =
+proc removePeer(network: EthereumNode, peer: Peer) =
   # It is necessary to check if peer.remote still exists. The connection might
   # have been dropped already from the peers side.
   # E.g. when receiving a p2p.disconnect message from a peer, a race will happen
@@ -914,7 +913,7 @@ proc callDisconnectHandlers(peer: Peer, reason: DisconnectionReason):
       trace "Disconnection handler ended with an error", err = f.error.msg
 
 proc disconnect*(peer: Peer, reason: DisconnectionReason,
-    notifyOtherPeer = false) {.async, raises: [Defect].} =
+    notifyOtherPeer = false) {.async.} =
   if peer.connectionState notin {Disconnecting, Disconnected}:
     peer.connectionState = Disconnecting
     # Do this first so sub-protocols have time to clean up and stop sending

eth/p2p/rlpx_protocols/whisper/whisper_types.nim

@@ -5,6 +5,8 @@
 #   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
 # at your option. This file may not be copied, modified, or distributed except according to those terms.
 
+{.push raises: [Defect].}
+
 import
   std/[algorithm, bitops, math, options, tables, times, hashes],
   chronicles, stew/[byteutils, endians2], metrics, bearssl,
@@ -519,7 +521,7 @@ proc initQueue*(capacity: int): Queue =
   result.capacity = capacity
   result.itemHashes.init()
 
-proc prune*(self: var Queue) {.raises: [].} =
+proc prune*(self: var Queue) =
   ## Remove items that are past their expiry time
   let now = epochTime().uint32
 
@@ -654,7 +656,8 @@ proc notify*(filters: var Filters, msg: Message) {.gcsafe.} =
    else:
      filter.handler(receivedMsg)
 
-proc getFilterMessages*(filters: var Filters, filterId: string): seq[ReceivedMessage] =
+proc getFilterMessages*(filters: var Filters, filterId: string):
+    seq[ReceivedMessage] {.raises: [KeyError, Defect].} =
   result = @[]
   if filters.contains(filterId):
     if filters[filterId].handler.isNil():

eth/p2p/rlpx_protocols/whisper_protocol.nim

@@ -29,6 +29,8 @@
 ## However, they only make real sense after ``connectToNetwork`` was started. As
 ## else there will be no peers to send and receive messages from.
 
+{.push raises: [Defect].}
+
 import
   std/[options, tables, times],
   chronos, chronicles, metrics,
@@ -247,7 +249,7 @@ p2pProtocol Whisper(version = whisperVersion,
 
 # 'Runner' calls ---------------------------------------------------------------
 
-proc processQueue(peer: Peer) {.raises: [Defect].} =
+proc processQueue(peer: Peer) =
   # Send to peer all valid and previously not send envelopes in the queue.
   var
     envelopes: seq[Envelope] = @[]
@@ -278,12 +280,12 @@ proc processQueue(peer: Peer) {.raises: [Defect].} =
     # gets dropped
     traceAsyncErrors peer.messages(envelopes)
 
-proc run(peer: Peer) {.async, raises: [Defect].} =
+proc run(peer: Peer) {.async.} =
   while peer.connectionState notin {Disconnecting, Disconnected}:
     peer.processQueue()
     await sleepAsync(messageInterval)
 
-proc pruneReceived(node: EthereumNode) {.raises: [Defect].} =
+proc pruneReceived(node: EthereumNode) =
   if node.peerPool != nil: # XXX: a bit dirty to need to check for this here ...
     var whisperNet = node.protocolState(Whisper)
 
@@ -296,7 +298,7 @@ proc pruneReceived(node: EthereumNode) {.raises: [Defect].} =
       # the received sets.
       peer.received = intersection(peer.received, whisperNet.queue.itemHashes)
 
-proc run(node: EthereumNode, network: WhisperNetwork) {.async, raises: [Defect].} =
+proc run(node: EthereumNode, network: WhisperNetwork) {.async.} =
   while true:
     # prune message queue every second
     # TTL unit is in seconds, so this should be sufficient?
@@ -401,7 +403,8 @@ proc unsubscribeFilter*(node: EthereumNode, filterId: string): bool =
   var filter: Filter
   return node.protocolState(Whisper).filters.take(filterId, filter)
 
-proc getFilterMessages*(node: EthereumNode, filterId: string): seq[ReceivedMessage] =
+proc getFilterMessages*(node: EthereumNode, filterId: string):
+    seq[ReceivedMessage] {.raises: [KeyError, Defect].} =
   ## Get all the messages currently in the filter queue. This will reset the
   ## filter message queue.
   return node.protocolState(Whisper).filters.getFilterMessages(filterId)